GHK AR New Simple Quick Adjust HOP Upgrade Kit

● Includes HOP-UP seat, patented adjustment tool, HOP-UP rubber)
● Material : Nylon
● Easy and quick tuning
● No dismantling handguard
● Generally available on the market GBB inner barrel
● Reliably fixed, not easy to be shaken loose
● For GHK AR GBB all series
GHK AR New Simple Quick Adjust Hop Upgrade Kit is for new hop system. It does not match the hop up rubbers which are for WE or Marui system.